Air

(particulate filter)^e

Gross alpha^c

3.61 x 10^-16 µCi/mL

2 x 10^-14 µCi/mL

Gross beta^d

1.11 x 10^-15 µCi/mL

3 x 10^-12 µCi/mL

Specific gamma (¹³⁷Cs)

1.69 x 10^-16 µCi/mL

4 x 10^-10 µCi/mL

Air (charcoal cartridge)^e

¹³¹I

1.115806 x 10^-15 µCi/mL

4 x 10^-10 µCi/mL

Air

(atmospheric moisture)

³H

78.3 pCi/L_water

1 x 10^-7 µCi/mL_air

Air (precipitation)

³H

72.2 pCi/L

2 x 10^-3 µCi/mL

Water

³H

78.2 pCi/L

2 x 10^-3 µCi/mL

Milk

¹³¹I

0.63 pCi/L

--

1.17 pCi/L

--

a The MDC is an estimate of the concentration of radioactivity in a given sample type that can be identified with a 95 percent level of confidence and precision of plus or minus 100 percent under a specified set of typical laboratory measurement conditions.

b DCGs, set by the DOE, represent reference values for radiation exposure. They are based on a radiation dose of 100 mrem/yr for exposure through a particular exposure mode such as direct exposure, inhalation, or ingestion of water.

c The DCG for gross alpha is equivalent to the DCGs for ^239,240Pu and ²⁴¹Am.

d The DCG for gross beta is equivalent to the DCGs for ²²⁸Ra

e The approximate MDC is based on an average filtered air volume (pressure corrected) of 445 m³/week.